Steam-boiler header



Patented Apr. 17, 1928.

UNITED STATES CHARLES GILBERT I-IVAWLEY, OF CHICAGO, ILLINOIS.

STEAM-BOILER vHEADER. i

.Application filedMarch 10, 1924.' Serial No. 698,213.

This invention relates to flat. stayed headers for steam generators, andl has for its object the provision of an improvedheader of simple form, which can be made to any desiredA length by use of standard components. It is common practice to construct flat stayed headers by nesting one flanged sheet lmetal element of dishvor basin form within a-iiotlieisiinilar element, and uniting the flanged parts thereof in a convenient manner, and when placing the header in situ, arranging for the the fire. Y.

rEhe present invention broadly consists in a header for a steam generator comprising two nested channel members having their webs parallel, and their flanges secured together, and end enclosures'therefor. I

The invention also consists in'the improved headers for steam generators substantially as hereinafter describedv with reference to the accompanying drawings, and defined in the claims.

The invention will be readily understood on reference to the drawings which form parts of this specification. Therein, Fig. l represents the outer lface of a steam boiler header embodying this invention ;-Fig. Zis a longitudinal section thereof, on the line 2-2 of Fig. l1,fviewed inthe direction of the arrows ;--Fig. 3 is a cross-section on the line 3-3 of Figs. 1 and 2 viewed in the direc'- tion of the arrows andy also illustrates t-he method of interconnecting adjacent headers ;-Fig. 4 is a kpartial longitudinal section on the line 4 4 of Fig. 2;-Fig- 5 is a sectional view corresponding tothe lower part of Fig. 2 but showing the outside member of the header extended, to provide an.

anchorage for a cross barthat may be used to fasten several headers together ;Fig. 6 resembles Fig. 3: but illustrates a slightly modified form of the outer member of the header and shows how the watertubes and the stay bolts are installed in the header;- Fig. 7 depicts the fire face of the header, with tubes and stay bolts as employed in one of in v steepied radiant heat steam boilers, to which reference may be made in my companion application S. N. 698,728 of even date herewith ;--Fig. 8 is a side or edge elevation of the header of Fig. 7;-Fig- 9 isV an outer face elevation thereof ,-Fig. 10 is a vertical section on the line 10-10 of Fig.

' Spe-and, Fig. tl comprises an end view of y joints to beV remote from ting. 1

one headerand cross sections' ofv other headers, placed side by side. y

The chief members of this improved steam boiler header comprise the four members, A, B, C, and D. The member A is a deep channel, made of boiler fire box plate. vThe member B is a shallow channel, preferably of the same material, though metal of lower The web porgrade maybe used therefor. tions A .and B" of thesemembers are flat and they are parallel. The members C and D are endplugs, which close the steam-andwater space E between the two channel members. The flanges B2 'of the shallow channel B `are nested between the flanges A2 of the deep channel `A and the two members are fastened together byk thelrows of'rivets, F,

whichvare pinch-'riveted through respective pairs of flanges A2 and B2.' The members (land D are preferably cupped or pressed to the form shown and therefore present outstanding flanges (C2, D2) that nest between the ends ofthe channel members. They are secured together by` perimetral rows of rivets G. The marginal edges are caulked and thus closed tightly` v.togetherv or may be welded autogenously, as indicated at points H. The web portion of' the channel A con.-

stitutes tube sheet and the lire face of the header; and, as will be apparent, all of the `joints of the header are uponthe exterior thereof and hence remote from the firev in the boiler furnace yand from the hot gases in the several gas passages of the boiler set- The inner'and outer face' or web-pon tionsof the header are connected by numerous short stay bolts I. The number and size ofthe stay bolts, I, will vary with the pressures at which dilferentheaders are to be employed. The arrangement thereof always accords Awith the size and arrangement of the water. tubes (such as J) to be accommodated by the header. The side flanges A2 of the deep channel A are bulged outward in their intermediate portions between the webs of' the two channels, as shown at points A3. These bulging sides JAS-A3 are curved preferably upon radii of a length .about the same as the distance between theweb portions of the two channels. Thus the need of stay-bolting orV otherwise bracing the sides ofthe header is avoided, the various stresses ybeing thereby properly cared for. The juncture portions A* be` tween the portions A and A3. are Yformed ion upon radii of minimum length for the sake oit' strength. and to the end that tubes J may be placed close to the side of the header.

Obviously each tube J is secured in-a tube hole in the web or4 tube. sheet .portion A of the header. For each tube', the web B oi' the channel B has a hand hole BhtseevFig. 9) through which the tube may be Worked and cleaned. rl`hese lholes B are .usually large enough to permit a tube to be passed through the `san-ie `and are closed by hand hole plates (not shown). In cases 'not -requiring' the insertion ol tubes through the outer 'iace ot the header, the access holes 'ther-ein may be closed by screuv plugs, K, as shown iin Fig. 6.l p

The channels il'for vthese yheaders can obviously be produced by `either rolling or bendF ing operations and thereforein any desired lengths, easily producing headers up tov thirty or forty feet long', ii' necessary, and in Widths of -two to 'six ieet, ormo're 'it desired. Byw increasingl y the depth ,of the flanges oft' the deeper channel "member, the depth or thickness Aolf the header member -i'nay also be varied as desired.` l

The channel B of lthe header yis usually a rolled member and `th'ereiore presents corners B4 that closely lContact the inner sides oit the lang'e's A2. 'l`liis lis the 'better construction. But obviously an ordinary sheet may have its edges lbent to v'form flanges as shox'vn in Figo. No difficulty is experiencedY atth'e header ends', "for it is an easy matter to close fivitlr Welding-material the odd shaped cracks around the plugs C, D.

To facilitate the vfastening ofthe header in any desired position as a i'art of the boiler and. itssetting", ll provide `the end brackets hereshovvn, one 'for veach end of the header.. The channel E as yshoivn 'is someyvhatlon'g fr than the vchannel A, providingfan yanchorage portion v11%, ljeyo'ndthe rivets of 'then adjacent header plug. Tol'this 'anchorage isfrivet'ed the angle iron L, having` its ends reinforced bles, O, lirst flattening the adjacent parts.

oi the bulging sides AJ* ot the headers, as shown in 'Fig'. Q3. These thimbles are `always vaccessible (through adjacent hand holes in the outer tace of the header.

As several inoditicatfions of this apparently simple invention ill readily suggest the'niselves to those slillled Vi'n the art, it is to 4be understood that the invention is by no -n'ieans lin'rited 'to thefspeciiic structures herein shown.

l-.l-avi'n'g thus described my invention I Aclaim as new 'and desire to 'secure 'by'l'iette'rs Patent: l y l l. The herein described hea'der'com'prising, in combination', deep and'shal'lovv channels h'aving their Fiianges nested and riveted together, leavinglr a Asteann-and-Water space between tlieirnsuitably fastened plug's e'losing` the 'ends of said space,and the shallow channel being eXte-'n'dedfendivise 'beyond `one or 'be t'h vsalid plu "to lprovide 'anchorage supports for'ther-header. I

The herein described 'elternally flanged and riveted Hat header presetitiiig spaced and stay-bolted inner y"and outer Web' `portions, and bulging sides thatv extend outivard'ly be iid the riveted portions of the header flanges.

yIn testimony whereof signature.

"CHARLES @runner EAW-nar.

hereby ajiix my 

